A device for changing the spline shaft and gear of a flat rolling mill

Abstract

This utility model discloses a spline shaft and gear replacement device for a flat rolling mill, relating to the technical field of steel production equipment. The device includes a C-shaped frame formed by an upper horizontal frame, a vertical frame, and a lower horizontal frame. Several balancing lifting points are provided on the upper horizontal frame, and a fixing mechanism that cooperates with the gear is provided inside the lower horizontal frame. This utility model effectively solves the problem of repeated adjustments due to lifting imbalance during the replacement of spline shafts and gears in flat rolling mills, allowing for the replacement of spline shafts or gears in a single operation, thus improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of steel production equipment, and in particular relates to a device for replacing the spline shaft and tooth of a flat rolling mill. Background Technology

[0002] In the bar rolling process, alternating flat and vertical rolling mills are used for repeated plastic deformation rolling to obtain round steel of different diameters. The spline shaft of the flat rolling mill in the steel rolling equipment is a key component that transmits the power from the gearbox to the rolling mill. A failure in this component will lead to production stoppage. Therefore, when replacing the spline shaft and gears, the replacement time should be minimized as much as possible.

[0003] When the splined shaft malfunctions, its length reaches three meters and it is located in the middle of the support frame of the flat rolling mill. To remove or reinstall the splined shaft, it needs to be hoisted horizontally. However, due to the obstruction of the support frame, it must be hoisted horizontally with two steel wire ropes and moved slowly. When it encounters the support frame, the steel wire ropes need to be re-tied, and this process is repeated until the splined shaft is moved to the required position, which takes a long time. When only the tooth head is replaced without replacing the splined shaft, the tooth head is always eccentric when hoisting it because it is inside the splined shaft. The tooth head will fall downwards, requiring manual intervention to press it down from behind. This not only poses a safety risk but also wastes time and seriously affects production efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to reduce the number of adjustments required during the replacement process of the spline shaft and gear head of the flat rolling mill, and improve the efficiency of troubleshooting.

[0005] To achieve the above objectives, this utility model provides a device for changing the spline shaft and gear head of a flat rolling mill, comprising:

[0006] The C-shaped frame is composed of an upper horizontal frame, a vertical frame, and a lower horizontal frame. Several balancing suspension points are set on the upper horizontal frame, and a fixing mechanism that cooperates with the toothed head is set inside the lower horizontal frame.

[0007] The fixing mechanism includes: an adjusting screw located at the center of the lower horizontal frame, an adjusting nut on the adjusting screw, a first connecting rod and a second connecting rod symmetrically connected on both sides of the adjusting nut, one end of the first connecting rod being connected to a first top block that can extend out of the lower horizontal frame, and one end of the second connecting rod being connected to a second top block that can extend out of the lower horizontal frame. The first connecting rod and the second connecting rod can rotate around the adjusting nut as a fulcrum.

[0008] The two side walls of the lower horizontal frame are respectively provided with a first through hole and a second through hole. The first top block is set in the first through hole and the diameter of the first through hole is slightly larger than the diameter of the first top block. The second top block is set in the second through hole and the diameter of the second through hole is slightly larger than the diameter of the second top block.

[0009] The bottom surface of the lower horizontal frame has an opening for adjusting the fixing mechanism.

[0010] The length of the upper horizontal frame is much greater than the length of the lower horizontal frame.

[0011] As the adjusting screw rotates, the adjusting nut moves left and right with the adjusting screw, driving the first connecting rod and the second connecting rod to rotate. The first connecting rod and the second connecting rod respectively push the first top block and the second top block to move until they press against the inner wall of the tooth head.

[0012] The balancing points include: the body balancing point, the gear head balancing point, and the spline shaft balancing point.

[0013] The balancing point is a lifting ring structure, which is detachably connected to the upper horizontal frame.

[0014] Beneficial effects: The spline shaft and tooth replacement device of this utility model effectively solves the problem of repeated adjustment required when replacing spline shafts and teeth of flat rolling mills due to lifting imbalance. It can complete the replacement of spline shafts or teeth in one go without complicated repeated adjustment process, saving a lot of time and labor costs, reducing safety risks, improving troubleshooting efficiency, and improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a front view of the spline shaft and tooth replacement device for a flat rolling mill according to this utility model.

[0016] Figure 2 This is a side view of the spline shaft and gear replacement device for a flat rolling mill according to this utility model.

[0017] Figure 3 This is an enlarged view of the structure of the fixing mechanism A inside the lower horizontal frame of this utility model.

[0018] In the diagram: 1-Upper horizontal frame; 2-Vertical frame; 3-Lower horizontal frame; 31-Adjusting screw; 32-Adjusting nut; 33-First connecting rod; 34-First top block; 35-Second connecting rod; 41-Body balance lifting point; 42-Gear head balance lifting point; 43-Spline shaft balance lifting point. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1

[0021] refer to Figure 1-3 As shown, a spline shaft and tooth replacement device for a flat rolling mill includes: a C-shaped frame formed by an upper horizontal frame 1, a vertical frame 2 and a lower horizontal frame 3, wherein the upper horizontal frame 1 is provided with several balance lifting points, and the lower horizontal frame 3 is provided with a fixing mechanism that cooperates with the tooth.

[0022] The fixing mechanism includes: an adjusting screw 31 set on the center plane of the lower horizontal frame, an adjusting nut 32 set on the adjusting screw 31, a first connecting rod 33 and a second connecting rod 35 symmetrically connected on both sides of the adjusting nut 32, one end of the first connecting rod 33 is connected to a first top block 32 that can extend out of the lower horizontal frame 3, and one end of the second connecting rod 35 is connected to a second top block that can extend out of the lower horizontal frame. The first connecting rod 33 and the second connecting rod 35 can rotate with the adjusting nut 32 as the fulcrum.

[0023] The lower horizontal frame 3 has a first through hole and a second through hole on its two side walls respectively. The first top block 34 is set in the first through hole and the diameter of the first through hole is slightly larger than the diameter of the first top block 34. The second top block is set in the second through hole and the diameter of the second through hole is slightly larger than the diameter of the second top block.

[0024] The bottom surface of the lower horizontal frame 3 has an opening for adjusting the adjusting screw 31 and for facilitating equipment maintenance.

[0025] The length of the top horizontal frame 1 is much greater than the length of the bottom horizontal frame 3.

[0026] In this embodiment, as the adjusting screw 31 rotates, the adjusting nut 32 moves left and right with the adjusting screw 31 and drives the first connecting rod 33 and the second connecting rod 35 to rotate. The first connecting rod 33 and the second connecting rod 35 respectively push the first top block 34 and the second top block to move until they press against the inner wall of the tooth head, so that the C-shaped frame is stably connected to the tooth head.

[0027] The balancing points include: body balancing point 41, gear head balancing point 42, and spline shaft balancing point 43.

[0028] The process of replacing the spline shaft and gear head in this utility model is as follows: A steel wire rope is suspended from the main body's balance point 41. The C-shaped frame is lifted, and the lower horizontal frame 3 is inserted into the gear head, with a gap of approximately 2mm between the lower horizontal frame 3 and the inner wall of the gear head. The end of the adjusting screw 31 inside the C-shaped frame is rotated, causing the adjusting screw 31 to drive the adjusting nut 32 forward. The adjusting nut 32 pushes the first connecting rod 33 and the second connecting rod 35 to rotate. The first connecting rod 33 and the second connecting rod 35 respectively push the first top block 34 and the second top block outwards. The first top block 34 and the second top block will gradually extend from the C-shaped frame until they are pressed tightly against the inside of the gear head, preventing the C-shaped frame and the spline shaft or gear head from separating during movement. The steel wire rope is then connected to the gear head's balance point 42, and the gear head is lifted and removed. When replacing the spline shaft, simply connect the steel wire rope to the spline shaft's lifting point 43; other operations remain unchanged.

[0029] The specific location of the balancing lifting point is calculated through mechanical simulation based on the structure and mass distribution of the spline shaft and gear head. Therefore, during lifting, the entire frame and the spline shaft or gear head are balanced and stably connected, which allows the spline shaft or gear head to be moved in one go, greatly improving safety and saving time.

[0030] Example 2

[0031] A device for changing the spline shaft and tooth of a flat rolling mill includes: a C-shaped frame formed by an upper horizontal frame 1, a vertical frame 2 and a lower horizontal frame 3, wherein the upper horizontal frame 1 is provided with a number of balance lifting points, and the lower horizontal frame 3 is provided with a fixing mechanism that cooperates with the tooth.

[0032] In this embodiment, the upper horizontal frame 1 is provided with several connecting holes, and the balancing lifting points are detachably connected to the connecting holes. The lifting points are lifting ring structures. For gear heads and splined shafts of different specifications, the installation position of the balancing lifting points can be flexibly selected to meet their mechanical balance requirements.

[0033] In summary, the present invention provides a replacement device for spline shafts and gears in a flat rolling mill, which effectively solves the problem of repeated adjustments required when replacing spline shafts and gears in a flat rolling mill due to lifting imbalance. It can complete the replacement of spline shafts or gears in one go without a complicated repeated adjustment process, saving a lot of time and labor costs, reducing safety risks, improving troubleshooting efficiency, and increasing production efficiency.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A flat rolling machine spline shaft and tooth head replacement device, characterized by, It includes a C-shaped frame consisting of an upper horizontal frame, a vertical frame, and a lower horizontal frame. Several balancing suspension points are provided on the upper horizontal frame, and a fixing mechanism that cooperates with the toothed head is provided inside the lower horizontal frame.

2. The device for changing the splined shaft and gear head of a flat rolling mill according to claim 1, characterized in that, The fixing mechanism includes: an adjusting screw located at the center of the lower horizontal frame, an adjusting nut on the adjusting screw, a first connecting rod and a second connecting rod symmetrically connected on both sides of the adjusting nut, one end of the first connecting rod being connected to a first top block that can extend out of the lower horizontal frame, and one end of the second connecting rod being connected to a second top block that can extend out of the lower horizontal frame. The first connecting rod and the second connecting rod can rotate around the adjusting nut as a fulcrum.

3. The device for changing the splined shaft and gear head of a flat rolling mill according to claim 2, characterized in that, The two side walls of the lower horizontal frame are respectively provided with a first through hole and a second through hole. The first top block is set in the first through hole and the diameter of the first through hole is slightly larger than the diameter of the first top block. The second top block is set in the second through hole and the diameter of the second through hole is slightly larger than the diameter of the second top block.

4. The device for changing the splined shaft and gear head of a flat rolling mill according to claim 2, characterized in that, The bottom surface of the lower horizontal frame has an opening for adjusting the fixing mechanism.

5. The device for changing the splined shaft and gear head of a flat rolling mill according to claim 1, characterized in that, The length of the upper horizontal frame is much greater than the length of the lower horizontal frame.

6. The device for changing the splined shaft and gear head of a flat rolling mill according to claim 2, characterized in that, As the adjusting screw rotates, the adjusting nut moves left and right with the adjusting screw, driving the first connecting rod and the second connecting rod to rotate. The first connecting rod and the second connecting rod respectively push the first top block and the second top block to move until they press against the inner wall of the tooth head.

7. The device for changing the splined shaft and gear head of a flat rolling mill according to claim 1, characterized in that, The balancing points include: the body balancing point, the gear head balancing point, and the spline shaft balancing point.

8. The device for changing the splined shaft and gear head of a flat rolling mill according to claim 1, characterized in that, The balancing point is a lifting ring structure, which is detachably connected to the upper horizontal frame.

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